Elbow core-pulling structure of water inlet elbow injection mold

Abstract

The utility model is applicable to the technical field of water inlet elbow injection molds, and particularly relates to an elbow core-pulling structure of a water inlet elbow injection mold, which comprises a base, a lower mold plate is arranged on the surface of the base, an upper mold plate is arranged on the surface of the lower mold plate, an inclined guide post is arranged in the upper mold plate, a central bearing is mounted on the surface of the base, and a water inlet pipe is arranged in the central bearing. And a rotating rod is mounted in the center bearing, and the outer side of the rotating rod is sleeved with a rotating block. By arranging the core pulling structure formed by matching the rotating block and the gear rotating assembly, the rotating block realizes stable arc-shaped core pulling movement under the driving of the gear, and the inclined guide column is combined to control the flange sliding block to finish the linear core pulling operation of the front section, so that the accurate linkage of linear core pulling and rotating core pulling is realized, and the production efficiency is improved. The problem that a connecting rod in a traditional structure is not smooth in movement is effectively solved.

Description

Technical Field

[0001] This utility model relates to the field of injection mold technology for water inlet bends, specifically a core-pulling structure for a water inlet bend injection mold. Background Technology

[0002] Existing injection molds for water inlet bends typically employ a linkage mechanism combined with a core-pulling structure to demold the bend inserts, using a slanted guide post to drive the flange slider for demolding. While this design offers some simplicity and can accomplish basic demolding, it often suffers from problems such as complex linkage transmission paths, limited motion accuracy, and poor motion consistency during actual production. Especially under high-frequency injection molding conditions, the mechanical fatigue of the linkage mechanism and the gradual increase in clearance can easily lead to jamming or misalignment during the core-pulling process, and even structural damage to the mold, severely affecting the molding quality of the injection molded parts and the mold's lifespan.

[0003] Furthermore, in traditional structures, the rotating center used to drive the core pulling of the bent pipe insert is mostly a central shaft assembly, which typically relies on bolt locking for positioning and fixation. However, under long-term production conditions, the locking bolts are prone to loosening due to thermal expansion and contraction and vibration impact, leading to the failure of the central shaft positioning. This affects the accuracy of the rotating core pulling action and may even require frequent mold disassembly and adjustment, severely restricting production efficiency and increasing the workload of mold maintenance, resulting in higher overall operating costs. Utility Model Content

[0004] The purpose of this utility model embodiment is to provide a core-pulling structure for a water inlet bend injection mold, which aims to solve the technical problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A core-pulling structure for an injection mold of a water inlet bend includes a base, a lower template on the surface of the base, an upper template on the surface of the lower template, an inclined guide post inside the upper template, a central bearing on the surface of the base, a rotating rod inside the central bearing, a rotating block sleeved on the outer side of the rotating rod, a flange slider slidably connected inside the rotating block, a bend seat connected to the side of the rotating block, a bend insert inside the flange slider, and a bushing hole insert on the side of the flange slider.

[0007] The surface of the lower template is fitted with a pressure strip, and a limiting surface is formed on the surface of the lower template;

[0008] The base and the lower template are both provided with a gear rotating assembly, which is used to drive the rotating block to rotate through the rotating rod and the central bearing.

[0009] Furthermore, the gear rotation assembly includes a first mounting base connected to the side of the lower template, a hydraulic motor mounted on the surface of the first mounting base, a second mounting base connected to the side of the base, and a drive gear rotatably mounted on the surface of the second mounting base.

[0010] The base is rotatably mounted with a balance gear, a driven gear, and a transmission gear, with the driven gear sleeved on the outside of the rotating block.

[0011] Furthermore, the transmission gear is engaged with the driving gear, the driven gear is engaged with the transmission gear, and the balancing gear is engaged with the driven gear.

[0012] Furthermore, the surface of the base is equipped with three gear assemblies, the surface of the second mounting base is equipped with one gear assembly, and the balance gear, driven gear and transmission gear are all rotatably mounted on the base through the gear assemblies, while the driving gear is rotatably mounted on the second mounting base through the gear assemblies.

[0013] Furthermore, the lower surface of the rotating block is provided with wear-resistant plates.

[0014] The present invention provides a core-pulling structure for an injection mold of a water inlet bend, which has the following beneficial effects:

[0015] By designing a core-pulling structure formed by the cooperation of a rotating block and a gear rotating assembly, the rotating block achieves stable arc-shaped core-pulling motion under gear drive. Combined with the inclined guide post controlling the flange slider to complete the front-end linear core-pulling operation, this achieves precise linkage between linear and rotary core-pulling, effectively solving the problem of unsmooth linkage movement in traditional structures. Simultaneously, the coaxial limiting design of the rotating block and rotating rod eliminates the risk of loosening of the central shaft, significantly improving the stability of the mold's core-pulling action and the mold's operational durability, providing reliable support for high-frequency injection molding production. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the core-pulling structure of a water inlet bend injection mold.

[0017] Figure 2 This is a schematic diagram of the upper and lower templates in a core-pulling structure of a water inlet bend injection mold, where the templates are in a separated state.

[0018] Figure 3 This is a schematic diagram of the lower template and various components mounted on the lower template in the core-pulling structure of a water inlet bend injection mold.

[0019] Figure 4 This is a schematic diagram of the core-pulling structure of a water inlet bend injection mold in its initial state.

[0020] Figure 5 This is a schematic diagram of the core-pulling structure of a water inlet bend injection mold in the completed core-pulling state.

[0021] In the diagram: 1. Base; 2. Lower template; 3. Upper template; 4. Hydraulic motor; 5. First mounting seat; 6. Drive gear; 7. Second mounting seat; 8. Pressure strip; 9. Bending seat; 10. Flange slider; 11. Limiting surface; 12. Inclined guide post; 13. Inlet bend product; 14. Rotating block; 15. Balance gear; 16. Driven gear; 17. Rotating rod; 18. Transmission gear; 19. Bushing hole insert; 20. Bending insert. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0023] The specific implementation of this utility model will be described in detail below with reference to specific embodiments.

[0024] like Figures 1-5 As shown in the figure, the present invention provides a core-pulling structure for an injection mold of a water inlet bend, comprising a base 1, wherein a lower template 2 is provided on the surface of the base 1, and an inclined guide post 12 is provided on the lower template 2. An upper template 3 is provided on the surface of the lower template 2, and the inclined guide post 12 is provided inside the upper template 3. The upper template 3 is also provided with a telescopic structure for driving the inclined guide post 12 to move.

[0025] A central bearing is mounted on the surface of the base 1, and a rotating rod 17 is mounted inside the central bearing. A rotating block 14 is sleeved on the outside of the rotating rod 17. A flange slider 10 is slidably connected inside the rotating block 14, and a bent pipe seat 9 is connected to the side of the rotating block 14. A bent pipe insert 20 is provided inside the flange slider 10, and a bushing hole insert 19 is provided on the side of the flange slider 10.

[0026] A pressure strip 8 is installed on the surface of the lower template 2, and a limiting surface 11 is opened on the surface of the lower template 2.

[0027] The base 1 and the lower template 2 are both provided with a gear rotating assembly, which is used to drive the rotating block 14 to rotate through the rotating rod 17 and the central bearing.

[0028] The gear rotation assembly includes a first mounting base 5, which is connected to the side of the lower template 2. A hydraulic motor 4 is mounted on the surface of the first mounting base 5. A second mounting base 7 is connected to the side of the base 1, and a drive gear 6 is rotatably mounted on the surface of the second mounting base 7.

[0029] A balance gear 15, a driven gear 16, and a transmission gear 18 are rotatably mounted on the surface of the base 1, with the driven gear 16 sleeved on the outside of the rotating block 14. The transmission gear 18 is meshed with the driving gear 6, the driven gear 16 is meshed with the transmission gear 18, and the balance gear 15 is meshed with the driven gear 16.

[0030] In one embodiment of this utility model, the device is applicable to the core-pulling process after injection molding of the inlet bend product 13, that is, it is used to precisely demold the bend insert 20 from the inside of the inlet bend product 13. The specific implementation process is as follows:

[0031] First, the upper template 3 is separated vertically from the upper surface of the lower template 2, ensuring sufficient clearance between them. Then, the inclined guide post 12 is driven to move along a set path via a telescopic structure inside the upper template 3. During this movement, the inclined guide post 12 cooperates with the flange slider 10 inside the rotating block 14, causing the flange slider 10 to slide within the rotating block 14. This, in turn, drives the bushing insert 19 and the bend insert 20, both fixed thereon, to perform a core-pulling motion under the constraint of the bend seat 9. This core-pulling motion stops when the flange slider 10 touches the outer wall of the inlet bend product 13. At this point, the inclined guide post 12 disengages from the flange slider 10 and withdraws from inside the flange slider 10, completing the first stage of the linear core-pulling action.

[0032] Next, the hydraulic motor 4, mounted on the first mounting base 5, is activated. The hydraulic motor 4 drives the drive gear 6 to rotate. The drive gear 6 meshes with the transmission gear 18, driving the transmission gear 18 to rotate. This, in turn, drives the driven gear 16, which meshes with the drive gear 18, to rotate synchronously. The driven gear 16 is located outside the rotating block 14, so its rotation directly drives the rotating block 14 to rotate and pull the core in the bending direction via the rotating rod 17, using the central bearing as a fulcrum. Simultaneously, the balance gear 15, located on the surface of the base 1, meshes and rotates synchronously with the driven gear 16. This provides structural balance during gear rotation, preventing tooth breakage or other malfunctions caused by uneven meshing or uneven load, thereby enhancing the stability and service life of the entire gear rotation assembly.

[0033] During rotation, the rotating block 14, together with the flange slider 10, the bend seat 9, and the bend insert 20 fixed on it, jointly achieves a circular arc core-pulling motion around the central axis. Guided and constrained by the pressure strip 8, this rotational motion has good trajectory consistency and accuracy. When the rotating block 14 rotates to the point where its side contacts the limiting surface 11 of the lower template 2, the bend insert 20 has completed the entire core-pulling path and completely detached from the water inlet bend product 13. At this point, the entire bend core-pulling action is completed, thereby achieving the smooth demolding operation of the water inlet bend product 13.

[0034] The above structural design not only combines linear core pulling controlled by the inclined guide post 12 with rotary core pulling controlled by the gear mechanism, but also improves the stability and reliability of the core pulling action through the efficient cooperation of the rotating block 14 and the gear rotation assembly. It effectively avoids failure problems caused by loosening of the central rotating structure or jamming of the gear transmission, and significantly improves the operating efficiency and service life of the mold in continuous production.

[0035] In this embodiment, three gear assemblies are mounted on the surface of the base 1, and one gear assembly is mounted on the surface of the second mounting base 7. The balance gear 15, the driven gear 16 and the transmission gear 18 are all rotatably mounted on the base 1 through the gear assembly, and the driving gear 6 is rotatably mounted on the second mounting base 7 through the gear assembly.

[0036] Three gear assemblies are mounted on the surface of the base 1, which support the balance gear 15, the driven gear 16, and the transmission gear 18, respectively. Each gear is rotatably mounted through its corresponding gear assembly. The gear assemblies play a role in precise positioning and stable support on the base 1, ensuring that each gear maintains good meshing accuracy and transmission stability during high-speed operation, thereby ensuring the operating efficiency and service life of the entire gear rotating assembly.

[0037] Meanwhile, a gear assembly is mounted on the surface of the second mounting base 7, which is used to rotatably mount the drive gear 6. By setting the drive gear 6 on the independent second mounting base 7 and directly connecting it to the hydraulic motor 4, the drive gear 6 can efficiently transmit power to the transmission gear 18 under the drive of the hydraulic motor 4, and further drive the subsequent driven gear 16 and balance gear 15, thereby realizing the drive control of the rotating block 14.

[0038] The overall gear assembly structure forms a clear and defined power transmission path through the above arrangement, while effectively isolating structural interference between different gears, thus improving the mechanical response speed and structural coordination of the mold during the tube bending and core pulling process.

[0039] In this embodiment, a wear-resistant plate is provided on the lower surface of the rotating block 14. This wear-resistant plate is used to buffer and isolate the rotating block 14 from the lower template 2 or other contact parts during the bending and core-pulling rotation motion around the central axis, thereby effectively reducing structural wear caused by friction during rotation.

[0040] The wear-resistant material possesses excellent wear resistance and a low coefficient of friction, enabling it to maintain good durability and stability during long-term high-frequency operation. This prevents the rotating block 14 from being scratched, jammed, or experiencing a decrease in precision due to frequent contact with the lower template 2. It also helps maintain the smoothness of the rotational motion, improving the service life and operational reliability of the entire core-pulling structure. This structural design further enhances the durability of the mold under high-precision continuous production conditions.

[0041] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A water inlet elbow core-pulling structure of an injection mold for an elbow, comprising a base (1), and the surface of the base (1) is provided with a lower mold plate (2), the surface of the lower mold plate (2) is provided with an upper mold plate (3), and the inside of the upper mold plate (3) is provided with an inclined guide pillar (12), characterized in that, The surface of the base (1) is provided with a central bearing, and the inside of the central bearing is provided with a rotating rod (17), the outside of the rotating rod (17) is sleeved with a rotating block (14), the inside of the rotating block (14) is slidably connected with a flange sliding block (10), the side surface of the rotating block (14) is connected with an elbow seat (9), the inside of the flange sliding block (10) is provided with an elbow insert (20), and the side surface of the flange sliding block (10) is provided with a bushing hole insert (19). The surface of the lower mold plate (2) is provided with a pressing strip (8), and the surface of the lower mold plate (2) is provided with a limiting surface (11). The surfaces of the base (1) and the lower mold plate (2) are jointly provided with a gear rotating assembly, and the gear rotating assembly is used for driving the rotating block (14) to rotate through the rotating rod (17) and the central bearing.

2. The bend core-pulling structure of a water inlet bend pipe injection mold according to claim 1, characterized in that, The gear rotating assembly comprises a first mounting seat (5), and the first mounting seat (5) is connected to the side surface of the lower mold plate (2), the surface of the first mounting seat (5) is provided with a hydraulic motor (4), the side surface of the base (1) is connected with a second mounting seat (7), and the surface of the second mounting seat (7) is rotatably provided with a driving gear (6). The surface of the base (1) is rotatably provided with a balance gear (15), a driven gear (16) and a transmission gear (18), and the driven gear (16) is sleeved on the outside of the rotating block (14).

3. The core-pulling structure of a water inlet elbow injection mold according to claim 2, characterized in that, The transmission gear (18) is in meshing connection with the driving gear (6), the driven gear (16) is in meshing connection with the transmission gear (18), and the balance gear (15) is in meshing connection with the driven gear (16).

4. The bend core pulling structure of a water inlet bend injection mold according to claim 2, wherein, The surface of the base (1) is provided with three gear assemblies, the surface of the second mounting seat (7) is provided with one gear assembly, and the balance gear (15), the driven gear (16) and the transmission gear (18) are rotatably installed on the base (1) through the gear assembly, and the driving gear (6) is rotatably installed on the second mounting seat (7) through the gear assembly.

5. The core-pulling structure of a water inlet elbow injection mold according to claim 1, wherein, The lower surface of the rotating block (14) is provided with a wear-resistant sheet.

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